harvey



October 25, 1913.

DRAWING A careful Search has been made this day for the original drawingor a photolitl'mgraphic copy of the same,

for the purpoee of reproducing the said drawing to form a par; of thisbook, but at this time nothing can be found from which a. reproductioncan be made.

Finis D. Morris,

Chief of Division E.

UNITED STATES PATENT OFFICE.

FREDERICK GOODELL AND THOS. W. HARVEY, OF NETV YORK, N. Y.

SELF-SETTING SAWMILL.

Specification of Letters Patent No. 2,328, dated November 3, 1841.

To all whom it may concern.

Be it known that we, FREDERICK Goonnnn and THOMAS W. I-lAnvEY, of thecity, county, and State of New York, have invented a new and ImprovedMode of Constructing Sawmills; and we do hereby declare that thefollowing is a full and exact description, reference being had to thedrawings annexed.

The nature of our invention consists in attaching the shackle bars orpitmen to the side of the saw frame, instead of the top or bottom girtof the said saw frame, in moving the log carriage, by the use of a wormgear, the same being driven by a cone or adjusting pulley, in a slidingclutch, to throw into gear, the machinery, which works the log carriageback and forward, and stops or starts the same, in the method of formingthe cutting teeth of the saw, in the form of constructing the saw frame,and in the method of constructing the milldogs, with the apparatus foradjusting the log, it being self-acting.

, To enable others skilled in the art, to make and use our invention, wewill proceed to describe the same.

To the ordinary plan of constructing the mill edifice, having the usualplates, beams and fender posts, we add, immediately over the saw,between the fender posts, a suflicient number of cross timbers andstrong pieces, to place thereon the crank shaft placed upon plummerboxes for that purpose, and such other timbers as may be requisite forthe application of the driving power, communicated by a belt upon themain pulley, on the crank shaft.

The drawings represent amill constructed, having the fiy wheel andrunning gear above the saw frame; the same may be placed below the sawframe, in situations where it may be most desirable, without varying themeans in attaining it, or making material alterations in the generalconstruction of the mill, other than the necessary inversion or changeof order to effect the object.

A, A, A, A, A, Figure 1, are the proper timbers necessary in a new mill,built expressly to receive the running parts of our mode of constructingmills herein described, or in a mill altered to receive it. Y

B, Fig. 1, is the brank or main shaft placed in a horizontal line abovethe saw frame, upon three plumlner boxes, corresponding with the numberof stringers, marked a, a, a, and resting upon the same, the saidplummer boxes may be friction roller boxes, or otherwise; we prefer abox with the rollers.

C, C, Fig. 1, are fly wheels, having counter balances to the weight ofthe saw frame, and having eyes cast in the arm opposite to the saidcounter balance, to receive the wrist or stud by which the crank isformed, and to which stud, the shackle bar or pitman is attached; D, D,Figs. 1 and 2, the main or driving pulley.

E, E, Figs. 1 and 2, is the cone or graduating pulleys. F, Fig. 2, aresimilar pulleys inverse to the former connected by the belt 0, to which,if a single pair of cones are employed, in place of the set ofgraduating pulleys shown in the drawings, a belt shifter is affixed, andan index marked so as to show the increase or diminution of speed; G, G,Figs. 1 and 2, pinion wheel on the main shaft 3 to 1, of the wheel H,Figs. 1 and 2. Said Wheel 1-1 is affixed to the shaft I, I, Figs. 1 and2, upon which shaft is also aflixed the bevel wheel J, J, Figs. 1 and 2,working into a similar wheel upon an upright shaft K, Fig. 1, upon whichlast named shaft is a cog wheel L, Fig. 1, working into the rack gearupon the log carriage; by the said bevel gear the same is carried back,and serves the purpose of the gig in old mills. Upon the said uprightshaft K, is the wheel M, of the worm gear 0, Fig. 2, which wheel is madeto turn freely upon said shaft as does also the bevel wheel upon thesame, and are locked into motion, or suspended, by the clutches N, N,Fig. 2, as hereafter fully explained. 0, Fig. 2, is the worm gearworking into the said wheel M.

P, Fig. 2, is an upright rod connected with the clutch lever, ofclutches N, N, and is made to reach down, sliding in guide boxes, orsockets, affixed to the frame-work of the mill, for that purpose. Thesliding rod P, is furnished with a friction roller V, V, Figs. 2 and 3,at its lower end, in order to meet a projecting cant X, Fig. 3, securedto the tail-end of the logcarriage, by which the clutch is unlocked,-theprogress of said carriage is arrested when the saw has completed itscut, the said cant being adjusted for that purpose; a similar cant yFig. 3,-

at the head end of the carriage is brought in contact in the top of saidroller and arrests the return motion of the same.

Q, Fig. l, is the saw-frame, having plates of steel, or other metal (andmay be used without either) on the outside of the sides of thesaw-frame, sliding in four stands or guides R, R, R, and a similar one,not seen in the drawing, being hid by the representation of the log. Thesaid guides R, R, are made to adjust, being fastened upon the fenderposts S, S, Fig. 1, and the faces R of these adjustable guides beinggrooved to receive the steel plates, on the outer edges of thesaw-frame. The stands or guides R, R, have screw bolts passing throughslots in them, and through the fender posts, and are adjusted by thescrew nuts 00, w, as shown in the drawing.

T, Fig. 1, is the saw which may be con structed in any ordinary mode;but we prefer a saw having two fleam shaped teeth, set the width of thecut in opposite inclinations, from each other, and being filed to acutting edge, outward from the center of the saw, and the next tooth tobe without set, cutting out the central portion of the cut of thetimber. This tooth may be in the usual form, or it may be renderedsomewhat hooked, to give a thinner cutting edgethe' said saw being hungin stirrups of approved construction.

The log is to be fed to the saw by a continuous, instead of by anintermitting motion, and it has increased rake forward to allow of thisbeing done, without its being obstructed in its change, from the down,to the up stroke. The pitmen (one on each side of the saw frame) areconnected to the same by gooseneck fastenings, being secured by screwbolts to the frame.

The carriage and head-blocks may be constructed according to any common,or new and improved form, and any form of dogs may be used, suited tothe purpose. The manner of moving the log on the carriage, to set for aboard, is represented at Fig. 3, in which a, a, are the dogs, beingconstructed, by having in each, two upright pieces of metal, piercedwith holes to receive the dogging bars a, z, 2, z, the same being madefast by the screw a, a; the two upright parts of the dog are connectedby a cross-bar 29, through which the screw 6, 5, works; these dogs slideupon way pieces g, q, for that purpose, upon the head blocks. The saidscrews turn upon ournals on stands 1", r, placed at each end of the headblocks; if these screws are turned it is manifest that the log will bethereby set, and that, to a distance proportioned to their revolution.

The apparatus by which the setting is effected is described as follows:upon one end of each of the screws, is placed a ratchet pulley d, whichturns upon the shaft of the screw, and carries a pawl d said pawl takesinto the ratchet wheel d in a manner well understood. Around thosepulleys passes a cord, chain or band a the ends of which are attached atf, to a sliding bar f, said sliding bar being situated on the top of oneside of the carriage. A stand g is fastened to the floor of the mill, bymeans of a set screw g, there being a slot in the stand, for the purposeof adjusting it, so as to graduate the setting of the log. Throughsockets in the heads of the stand g, there passes a sliding rod 71-,from one end of which projects the offset 10. A catch m 171/ works on afulcrum pin on the side of the carriage and is borne down at its end 122by a spring m a weight z" attached to a cord passing over a pulley 7"serves to draw the rod h back, when its action is not counteracted, andbrings the offset w up to the head of the stand 9, as represented in thedrawing. In the operation of gigging back the carriage, the end m of thecatch m, is brought into contact with the inside of the offset 10, onthe bar 72 carrying said bar back, and raising the weight 2'; and thisit continues to do, until the end of m of the catch, is brought intocontact with the cant or lifter n, on the stand 9, and this is soadjusted as to disengage the rod h at the instant the saw has enteredthe head-block, and is entirely free from the log. The end 10 of the redIt, as it is drawn back, engages with the projecting piece Z, attachedto the slide f and turning the ratchet pulleys (Z d, sets the log ateach end, and that to an extent regulated at pleasure, by the adjustingof the stand g. It is requisite, after this to bring the slide f back toits former position preparatory to the resetting of the log, on thecompletion of the next cut, and this is effected in the followingmanner: Upon the reverse motion of the carriage, an arm or projection tupon the end of the slide f, is taken hold of by the catch, or springcatch 0 the stand of which is affixed to the floor, and this draws theslide f back, until the end 0 of said catch is brought into contact withthe stud u, attached to the carriage, which disengages the catch fromthe projecting piece If, and the slide f is liberated from its action.The stud a is made adjustable, as shown in the drawing, so that it maybe set to act at the required moment.

Fig. 4, represents the saw-frame. a, a, a, a, are truss braces; F)", bare wedges upon which the stirrup is placed; 0", c", the cross-heads,cl, 6 stiles or sides of saw frame. The effect of the truss braces, willbe to strain endwise upon the cross-head, when straining the saw, bywhich, a much lighter saw-frame may be used. j

To put this mill in operation the clutch lever 1', Fig. 2, is put down,when the worm wheel M, is clutched, which otherwise runs loose upon itsbearings, and is worked by the screw gear 0, which is driven by the conepulleys on the main shaft. All being ready and the driving power inmotion a tightening pulley is dropped upon the main belt S, S, Figs. 1and 2, when motion is given to the saw by the pitmen b, and to thelog-carriage, by the upright shaft K, working the pinion L, in the rackgear upon the carriage. At the lower end of the rod P, Fig. 2, is aroller '0, which strikes a cant m at the termination of the cut of theboard, lifting up the same, and sliding the clutch out of gear from wormwheel M, and lifting it up, so as to slide the clutch l into the bevelgear, at the head of the upright shaft K, which otherwise turns freelyupon its bearings, when the log-carriage is rapidly run back, until theroller 1) at the lower end of rod P is forced down by a cant y strikingthe upper part of said roller, and the motion of the carriage issuspended by thus sliding out of gear, the clutch, when the setting ofthe log is effected, as above described. A cord from the weight 2', Fig.3, to the clutch lever r, Fig. 2, may be made to bring down the clutch,and the operation is repeated, or otherwise the operator performs thesame, as before described. And we hereby declare our intention to workthe several parts collectively or separately; for example, we may insome cases work the mill, without the self-acting apparatus, and usedogs of usual form; or we may prefer, for some timber, the common saw,to the one described. We also may prefer to drive the gig shaft I, by abelt direct from the power drum, and throw out the pinion G, and thewheel H, and as before suggested, may prefer to place the whole gearing,beneath the saw frame instead of above it.

What we claim as new and desire to secure by Letters Patent is:

1. The particular manner in which we have arranged the working gear, asrepresented on the upper part of the mill-frame, for running thecarriage back and forth; by which arrangement we combine the method ofreversing the motion of the carriage, by the rod P operating upon theclutches by the action of its lower end on the cants m and 3 on thelog-carriage, as set forth; and the method of regulating the feed, bymeans of the cone or graduating pulleys, as described.

2. The manner of arranging the appara tus, for setting the log, as setforth;'said apparatus consisting of the sliding bar, the ratchet pulleyscl, cl, attached to the setting screws, 6, b, the slide bar it, thestand g and their immediate appendages, cooperating in the mannerdescribed.

3. The manner of trussing the saw frame, by means of the truss braces64, a", the wedges Z), 5, and the action of the stirrups on them instraining the saw.

4. We claim the feeding of the stuff to the saw by means of a continuousmotion, in combination with a reciprocating saw, having sufiicient raketo clear itself in rising, so as to admit of such continuous motion ofthe carriage, as set forth.

FREDERICK GOODELL. THOS. W. HARVEY.

Vitnesses SAML. GARFIELD, AMos P. HAWLEY.

